diff --git a/master.cfg b/master.cfg
index 1c58b47..07b477e 100644
--- a/master.cfg
+++ b/master.cfg
@@ -171,7 +171,8 @@ send to the gdb-testers mailing list."""
     for ss in ss_list:
         commit_id = get_builder_commit_id (name, ss.revision, ss.branch)
         if commit_id:
-            text += "\t<%s/%s/.git/tree/?id=%s>\n" % (git_url, name, commit_id)
+            text += "\t<%s/%s/.git/tree/?h=%s&id=%s>\n" % (git_url, name, quote (ss.branch),
+                                                           commit_id)
         else:
             text += "\t<Error fetching commit ID for %s>\n" % ss.revision